Moderate sun exposure has many benefits to human body, such as preventing and treating skin diseases, supplementing calcium, strengthening the body and so on, as follows:

1, prevention and treatment of skin diseases: UVB contained in sunlight, properly irradiated on the skin, can kill bacteria on the skin and enhance the skin's resistance. The more common psoriasis and eczema can be relieved by proper sunshine exposure;

2, enhance physical fitness: moderate sun exposure can enhance the body's resistance to pathogens such as viruses and germs, and increase the vitality of human phagocytes;

3, calcium supplementation: human exposure to sunlight can promote the synthesis of vitamin D in the skin, which is conducive to the absorption of calcium and phosphorus, the deposition of calcium in bones, the prevention and relief of osteoporosis and fractures, and the height growth of children;

4, promote metabolism: infrared rays in sunlight can enter subcutaneous tissue, play a role in keeping warm, can promote blood vessel expansion, accelerate blood circulation, and accelerate metabolism, especially suitable for pregnant women and other people who are negligent in activities;

5, relieve stress: moderate sun exposure can relieve the body's nervousness and improve the discomfort caused by depression and excessive pressure.

However, we should also pay attention to sunbathing, choose more mornings and afternoons, and avoid sunbathing in midsummer and at noon when the sun is strongest to prevent heatstroke and sunburn.